Showing 1 - 6 of 6
In this paper we tackle the problem of outlier detection in data envelopment analysis (DEA). We propose a procedure where we merge the super-efficiency DEA and the forward search. Since DEA provides efficiency scores which are not parameters to fit the model to the data, we introduce a distance,...
Persistent link: https://www.econbiz.de/10010577569
In this paper we study the profitability of car manufacturers in relation to industry-wide profitability targets such as industry averages. Specifically we are interested in whether firms adjust their profitability in the direction of these targets, whether it is possible to detect any such...
Persistent link: https://www.econbiz.de/10010871160
Cluster analysis refers to finding subsets of vertices of a graph (called clusters) which are more likely to be joined pairwise than vertices in different clusters. In the last years this topic has been studied by many researchers, and several methods have been proposed. One of the most popular...
Persistent link: https://www.econbiz.de/10011264314
incorporate data dependency in the clustering process. In this research we focus on clustering categorical sequences. The method … proposed here combines model-based and heuristic clustering. In the first step, the categorical sequences are transformed by an …, in the second step, using hierarchical clustering on the matrix of distances, the sequences can be clustered. This paper …
Persistent link: https://www.econbiz.de/10010871134
The topic of clustering has been widely studied in the field of Data Analysis, where it is defined as an unsupervised … process of grouping objects together based on notions of similarity. Clustering in the field of Multi-Criteria Decision Aid … clustering in MCDA using notions that are native to this field alone, and highlight the different structures which we may try to …
Persistent link: https://www.econbiz.de/10010617179
series model for each ATMs. For clustering, the succession of seven continuous daily withdrawal seasonality parameters of … better than the result of Andrawis, Atiya, and El-Shishiny (2011). This is due to clustering followed by a forecasting phase … without clustering. From a managerial perspective, the clusterwise cash demand forecast helps the bank’s top management to …
Persistent link: https://www.econbiz.de/10011052405